What level must the STLC and TCLP be to classify waste as non-hazardous?

To classify waste as non-hazardous according to the Toxicity Characteristic Leaching Procedure (TCLP) and the Statewide Tracking Level Criterion (STLC), the waste must demonstrate that its concentration of contaminants falls below a specific threshold. In this context, the threshold is set at 5 mg/L. If the concentration of lead or certain other hazardous materials in the leachate tested through TCLP is found to be below this level, the waste is not classified as hazardous. This criterion is essential for managing waste effectively and ensuring public and environmental safety.

The other levels presented do not align with the established regulatory standards; therefore, they would not appropriately classify waste as non-hazardous, emphasizing the importance of understanding these specific thresholds when assessing waste classification.